Improvement in burglar-alarms



M .YGATT & DOWN-ING.4

Burglar Alarm.

Patented Mar. .w 28, 1871.

N. PETERS. PHOTO-UTHOGRPNER. WASHINGTON. D. C..

aura smic @dimi @ffm H JOHN T. AMiniatur AND JOHN DoWNiNa or BINGHAMTQN, NEW 55011K;A

l iMPRovsMEN'r IN BUReLAR-ALARMS.

The Schedulerefen'ed to in these Letters Patent and making par; of the same.

We, JOHN T. MYGATT and J omsl DOWNING, of Binghamton, in the county of Broome and State of New York, have invented certain Ixnprovements'in Signal Apparatus forthe Detectiondof Burglars, of which the following is a specication.

Our inventionl relates to the combination andarrangement of gas-pipes and valves, connected with doors or Windows of buildings or safes in suchla manner that by opening said doors orwindows the usual night-light shall be extinguished and a colored light exhibited, whereby Watchmen or others understanding the arrangement may detect the 'designs of burglar-s. v

Figure 1 is a view of a safe or door partly open, showing the connections with the door and gas-pipes, embodying the' general principles of our invention'.

Figure 2 is a plan ofthe same.

A is a box representing a saie or room. v

B is the door, provided with projections Gon the inside ofthe door, with holes forthe connecting-hooks D, which hooks are attached tothe arms .E of the --valves in the gas-pipes. These pipes may be placedV under the floor, as represented in'the'acconipanying drawing, or in the window-casings or other localities, as the'case may require.

F is the ordinary service-pipe, towhich lthe nightburner is attached; and

G, the pipe for the colored or signal-light, which may be placed in any conspicuous position beyond the control of the burglar.

H is the main pipe connectingwith the servicev` pipes F and G, between the valves I and J.

If desired, the colored light may be dispensed with and the apparatus so arranged that the extinguish-r ment of the nightlightonly shallindicate thejdis tnrbance of the premises. Y y

On retiring at night the connecting-'hooks are attached to thedoor or window by entering' their points;-

iuto the holesV in the projecting piece `O,- when' the door is closed, which opensfthe valve I and partiallyv opens J, which allows `a lsuiicient quantity of gas to pass into the burnerfor a slight ignition. ,Boi-.h .bii'rn ers are then lighted, the signal-light having-ai coloredf shade and the night-light burning in thefordinaryv manner.

When'the door or window is opened it closes the valve I and extinguishes the night-light, and at the same time fully opens the valve J, which exhibits the colored orsignal-light, thereby indicating the presence of the burglar.' v Y I When the apparatus is designed to connect with the door or entrance of the building, an ,adjustablev connecting-projection O, substantially as and'for the n purpose hereinbefore set forth.

' JOHN T. MYGATT.

JOHN DOWNING.

Witnesses:

S. W. ROGERS, J. E. ROBIN. 

